/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package studio.raptor.ddal.core.parser.result.merger;

import com.google.common.base.Optional;

/**
 * 可排序列.
 * 
 * @author gaohongtao.
 */
public abstract class AbstractSortableColumn {
    
    private final Optional<String> owner;
    
    private final Optional<String> name;
    
    private final Optional<String> alias;
    
    private final OrderByColumn.OrderByType orderByType;

    public AbstractSortableColumn(Optional<String> owner, Optional<String> name, Optional<String> alias, OrderByColumn.OrderByType orderByType) {
        this.owner = owner;
        this.name = name;
        this.alias = alias;
        this.orderByType = orderByType;
    }

    public AbstractSortableColumn(Optional<String> owner, Optional<String> name, OrderByColumn.OrderByType orderByType) {
        this.owner = owner;
        this.name = name;
        this.alias = Optional.absent();
        this.orderByType = orderByType;
    }

    public Optional<String> getOwner() {
        return owner;
    }

    public Optional<String> getName() {
        return name;
    }

    public Optional<String> getAlias() {
        return alias;
    }

    public OrderByColumn.OrderByType getOrderByType() {
        return orderByType;
    }

    @Override
    public String toString() {
        return "AbstractSortableColumn{" +
                "owner=" + owner +
                ", name=" + name +
                ", alias=" + alias +
                ", orderByType=" + orderByType +
                '}';
    }
}
